What kind of boxes are we talking about here? Those plastic replacements or the cardboard boxes made to look like genuine SNES boxes?
I know there is a ebay seller based in UK whose cardboard reproduction boxes I have seen for sale several times. Mostly for rare or unreleased games. Not sure if they did anything to Terranigma or not.
They are quite expensive though, somewhere in the area of 40, and from the shots it is impossible to gauge the quality.